[vtkusers] Access imagedata

[cc cc]

Hello,

I want to get value of each point. The data is from vtkVolume16Reader, the
typical header frequently seen in vtk, used in vtkMarchingCubes. Below is
vtkVolume16Reader from sample code.
    vtkVolume16Reader *v16 = vtkVolume16Reader::New();
    v16->SetDataDimensions(64,64);
    v16->GetOutput()->SetOrigin(0.0,0.0,0.0);
    v16->SetDataByteOrderToLittleEndian();
    v16->SetFilePrefix("/.../VTK/VTKData/Data/headsq/quarter");
    v16->SetImageRange(1,93);
    v16->SetDataSpacing(3.2,3.2,1.5);
    v16->Update();
But how can I get value on each vertex? Please help. Best wishes.

Cheng
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